Multi-Tech Systems MTS2SA-T-R ユーザーズマニュアル

Chapter 10 

− Modem Mode AT Commands, S-Registers, and Result Codes 

Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A) 

 

Command: 

Values: 

0, 1 

 

 

> 

S

pecifies the method to be used by the DTE to control 

the flow of received data from the modem. 

 +IFC0 

 

None 

 

 

 

+IFC1   XON/XOFF on transmitted data (XON/XOFF on transmit data); do not pass 

XON/XOFF characters to the remote modem. 

 

+IFC2   Circuit 133 (Ready for Receiving). 

 

+IFC3   DC1/DC3 on circuit 103 (Transmitted Data) with DC1/DC3 characters being 

passed through to the remote DCE in addition local flow control applied. 

> 

Specifies the method to be used by the modem to control 

the flow of transmitted data from the DTE. 

 +IFC0 

 

None. 

 

 

+IFC1   XON/XOFF on received data. 

 +IFC2 

 

CTS/RTS. 

 

Command: +IFC? 

 

Command: +IFC=? 
 

Command: 

 (Not available in V.22bis) 

Values: 

0, 1 

Default:   0 

Description: 

This extended-format numeric parameter controls whether or not the extended-

format +ILRR:<rate> information text is transmitted from the modem to the DTE. 

 

 

+ILRR0 

Disables reporting of local port rate (+ILRR: is not transmitted).  

 

 

+ILRR1 

Enables reporting of local port rate (+ILRR: is transmitted). 

  

 

Command: 

+ILRR? 

  

 

 

Command: 

+ILRR=? 

  

The <rate> reported represents the current (negotiated or renegotiated) DTE-modem rate. If 

enabled, the intermediate result code is transmitted after any modulation, error control or 
data compression reports are transmitted, and before any final result code (e.g., CONNECT) 
is transmitted. The <rate> is applied after the final result code is transmitted. 

 

 

The DTE-modem port rate will change only if neither buffered mode nor error controlled 

means are enabled (+ES=x,0) and if the negotiated carrier rate (+MRR) does not match the 
current DTE-modem port rate (auto-detected from the previous command line). 

 

 

 

 

Decimal value representing the current (negotiated or renegotiated) DTE-modem 
rate: 0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, or 230400 

 

Optional decimal value reporting the RXD rate, if it is different from the TXD rate: 0, 

300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, or 230400 

 

 

 

Command: 

(Not available in V.22bis) 

Values: 

n/a 

Description: 

 

This numeric extended-format parameter specifies the data rate at which the modem will 
accept commands during online operation. It may be used to select operation at rates at 
which the modem is not capable of automatically detecting the data rate being used by the 
DTE. Specifying a value of 0 disables the function and allows operation only at rates 
automatically detectable by the modem. The specified rate takes effect following the 
issuance of any result code(s) associated with the current command line. 
The <rate> specified does not apply in Online Data State if Normal Mode (Direct Mode) of 
operation is selected. 
Defined Values: 
 <rate>

  Specifies the DTE-modem interface operation rate in bits/s. The available rates 

are: 0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, or 230400 

 

If unspecified or set to 0, automatic detection is selected and the character 
format is also forced to auto-detect, +ICF=0. 
If the rate specified is not supported by the modem, an ERROR result code will 
be returned. 

Command: +IPR? 

Command: +IPR=?